theoretical question

homemade Posted By homemade, Dec 22, 2012 at 8:56 AM

  1. SmokeyTheBear

    SmokeyTheBear
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    Don't forget those space rocks that keep on a coming down.
     
  2. pen

    pen
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    fingers crossed they stay small
     
  3. St_Earl

    St_Earl
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    so a boiler, then?

    that would explain the height.
    cool project. would love to see more of it.
    what is the space it's heating?
     
  4. sandpipe

    sandpipe
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    Some day we'll have fusion stoves and the ash left will weigh less than the pellet.
     
  5. homemade

    homemade
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    my house
     
  6. ChandlerR

    ChandlerR
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    I thought it was 5.
     
  7. St_Earl

    St_Earl
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    surely you mean 42.
     
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  8. subsailor

    subsailor
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    Please don't call me Shirley.
     
  9. Ironhorse74

    Ironhorse74
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    I don't think you can use the weight of the burnt pellets as efficiency. Efficiency would be something like BTU available in the pellets (approximatly 8700 BTU's per pound) / BTU's lost up the vent. Which assumes the remaining BTUs go into heating the house.

    Peace

    Brad
     
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  10. Harvey Schneider

    Harvey Schneider
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    %Efficiency = (BTUout / BTUin) x 100

    or

    %Efficiency = ((BTUin - BTUlost) / BTUin) x 100

    I think that 8700 BTU / pound may be a little too high. Actual energy yeild is reduced by moisture content of the pellets. That is the energy used to drive the absorbed water back into a vapor state.
    By the way, the relative humidity where the pellets are stored will affect the BTU's available because wood will reach an equilibrium moisture content with the air based on the relative humidity of the air. This is why wood changes dimensions winter to summer.
     
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  11. P38X2

    P38X2
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    So thus far we've learned that A) Harman stoves convert 100% of the potential wood pellet energy into 101% heat energy (even NEWP).... and B) NEWP are still wicked ashy? Correct?
     
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